If 1/3tr=uw, then __?

The hawaiian alphabet has 12 letters. how many permutations are posible for each number of letters?

Television sizes are based on the length of the diagonal of the television's rectangular screen. so, for example, a 70-inch television is a television having a diagonal screen length of 70 inches. if a 70 inch television's diagonal forms a 29°angle with the base of the screen, what is the vertical height (1) of the screen to the nearest inch? 70 inhin

The measurement of one angle of a right triangle is 42° what is the measurement of the third angle? (there is no picture)